Summer officially starts this Sunday. According to eye doctors, here are five tips for buying a good pair of sunglasses . . .

Make sure they have 100% U.V. protection.

U.V. rays are radiation from the sun that can make you develop cataracts.
A survey last year found less than half of us check the U.V. sticker on sunglasses before we buy them.
So check the tag the next time you buy a cheap pair at a gas station.
Some of those only block about 40% of U.V. rays.

Big sunglasses are better, because they keep more of the U.V. rays out. Ideally they should be oversized, and wrap around your face.

The color of the lenses doesn’t matter, and neither does how dark they are. Lighter lenses can still block all of the U.V. rays.

Enrique Iglesias and Pitbull are joining forces for an upcoming co-headlining tour across North America. The two turned to their social media followers to help them unveil the dates for their tour. Select fans who tweeted them Tuesday were sent details of each show, allowing the fans to then announce the dates to the world.

The road trip will kick off on September 12th with a show in Newark, New Jersey. Among the other cities hosting the duo are Washington DC, New York, Boston, Los Angeles, Atlanta and Orlando. The pair will also touch down in the Canadian cities of Montreal and Toronto. The trek will wrap up on October 25th in Hollywood, Florida. Joining Pitbull and Enrique on the road as the opening act will be Colombian singer J Balvin.

Tickets for the tour will go on sale May 9th. Here’s a look at the dates For Enrique Iglesias and Pitbull’s tour:

The Carters – aka Beyoncé and Jay Z – have officially announced their rumored joint tour. Bey and Jay Z will head out on a 16-date “On The Run” stadium tour, starting in Miami on June 25th and wrap things up in San Francisco on August 5th.

And get this – if you’re a Chase cardholder or a Beyoncé Fan Club members – you can get your tickets via pre-sale today at 10am. As for the rest of us, general pre-sale will be available at 10am on May 1st. Feeling charitable? You’ll be happy to hear that $1 from each ticket sale will be donated to the Shawn Carter Foundation, which provides scholarships to underserved students. The donations are in partnership with Bey’s #BeyGOOD initiative, which supports a number of charities.

The news wasn’t too shocking considering the couple recently made surprise appearances during the first weekend of Coachella, with Bey popping in during her sister Solange’s set and Jay Z dropping by Nas’ midnight set in Indio.